2018 Honda CMX300 Problems: 0 Complaints, 2 Recalls

The worst 2018 Honda CMX300 problems

Ranked by number of owner complaints. Mileage and cost come from what owners wrote.

Tap a problem to see which part fails, at what mileage and in which other years.

Steering: critical fastenersReported July 30, 2026 · 43,913 vehicles affected

What is wrong: Honda (American Honda Motor Co.) is recalling certain 2017-2023, 2025 CMX500, 2017-2023, 2025-2026 CMX300, and 2025 Honda SCL500 motorcycles. The handlebar lock screw may loosen and detach.
Risk: A detached screw may lodge between the frame and stem, interfering with steering and increasing the risk of a crash or injury.
Remedy: Dealers will replace the lock screw and apply thread lock, free of charge. Owner letters were mailed September 29, 2026. Owners may contact Honda's customer service at 1‑866‑784‑1870. Honda's number for this recall is KU8. This recall expands previous the federal safety agency recall number 26V146. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on beginning August 4, 2026.

Recall number 26V500000 · Recall details

Power train: manual transmissionReported June 4, 2019 · 3,898 vehicles affected

What is wrong: Honda (American Honda Motor Co.) is recalling certain 2019 CB300R, 2018 CBR300R, 2018 CRF250L, 2018 CRF250L Rally, and 2018-2019 CMX300 motorcycles. The circlip, on the transmission's main shaft, may detach allowing for gear misalignment.
Risk: A misaligned gear can shift the transmission from neutral into gear during engine start, potentially resulting in unexpected motorcycle movement or seize the transmission and rear wheel while the motorcycle is in motion. Both conditions increase the risk of crash or injury.
Remedy: Honda will notify owners, and dealers will replace the transmission main shaft, free of charge. The recall began July 8, 2019. Owners may contact Honda customer service at 1‑866‑784‑1870. Honda's number for this recall is KK3.

Recall number 19V412000 · Recall details

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

Is the 2018 Honda CMX300 reliable?

Owners have filed 0 complaints about the 2018 Honda CMX300.

What is the most common problem with the 2018 Honda CMX300?

There are not enough complaints to tell.

How many recalls does the 2018 Honda CMX300 have?

2 recalls, covering steering and power train.

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